JP2005283092A - Solar heat collecting and radiating device, and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar heat collecting and radiating device excellent in light condensing efficiency and radiation efficiency, and allowing easy and inexpensive production. <P>SOLUTION: This device is provided with a substrate 17 comprising two sheets of upper and lower metal sheets 14, 15, and provided with a plurality of fluid flowing parts 16 extended longitudinally. A plurality of CPC type reflection plates 18 is provided in the substrate 17 to position the fluid flowing parts 16 in a lower end part of an inside thereof. The fluid flowing part 16 is formed by bulging the upper metal sheet 14 upwards. The CPC type reflection plate 18 is formed of a right half body 18a positioned in the right side of the fluid flowing part 16, and a left half body 18b positioned in the left side of the fluid flowing part 16. A reflection plate constitutive member 24 integrated with the left half body 18b of the CPC type reflection plate 18, and the right half body 18a of the CPC type reflection plate 18 adjacent to the left side, in upper ends thereof, is arranged between the adjacent fluid flowing parts 16. Both side edge parts of the reflection plate constitutive member 24 are engaged with the fluid flowing parts 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a solar heat collecting and radiator and a manufacturing method thereof.

  In this specification and claims, the top and bottom and the left and right in FIG. In addition, the lower side of FIG.

  Conventionally, solar heat collectors that convert sunlight energy, which is clean energy, into heat during the daytime and heat fluid such as water and antifreeze liquid by this heat, and conversely, fluids such as water and antifreeze liquid at night There is known a radiant cooling device for radiatively cooling the radiant.

  As a solar heat collector, a hollow box-shaped casing whose upper wall is made of a glass plate, and a plurality of compound parabolic concentrator reflectors (hereinafter referred to as CPC reflectors) disposed in the casing. ) And a fluid circulation pipe disposed in the reflector (for example, see Patent Document 1). In this solar thermal collector, the CPC type reflector is attached to the casing by fitting the CPC type reflector in a bowl-shaped groove formed in the resin heat insulating material, and connecting both side edges of the CPC type reflector to the heat insulating material. In this case, a heat insulating material that holds the CPC type reflection plate is disposed in a plurality of casings so as to be engaged with protrusions formed on the upper edges of both side surfaces of the bowl-shaped groove.

  However, in the solar heat collecting apparatus described in Patent Document 1, in order to increase the holding strength of the CPC type reflector, the thickness of the ridges must be increased, and as a result, the ridges block sunlight. As a result, there is a problem that a shadow is formed on the reflecting plate and the light collecting efficiency is lowered. Further, there is a problem that the amount of the heat insulating material becomes relatively large and it is necessary to form the shape having a bowl-shaped groove, which increases the material cost and the manufacturing cost.

  Therefore, as a solar heat collecting apparatus that prevents a reduction in light collection efficiency, a hollow box-shaped casing whose upper wall is made of a glass plate, a plurality of CPC-type reflecting plates arranged in the casing, and a reflecting plate A fluid circulation pipe, and the CPC type reflection plate is fitted into a bowl-shaped groove formed in the resin heat insulating material, and both side edges of the CPC type reflection plate are attached to the retaining member attached to the heat insulating material. There has been proposed a structure in which a CPC type reflection plate is attached to a casing by disposing a heat insulating material that is engaged with the formed protrusion and holds the CPC type reflection plate in a plurality of casings (for example, Patent Documents). 2).

  However, since the solar heat collecting apparatus described in Patent Document 2 requires a retaining member separately from the heat insulating material, there is a problem that the number of parts increases and the weight increases. In addition, as in the case of the solar heat collecting apparatus described in Patent Document 1, the amount of the heat insulating material is relatively large, and it is necessary to form the shape having a bowl-shaped groove, which increases the material cost and the manufacturing cost. There's a problem.

  Moreover, in the solar heat collecting apparatus described in Patent Documents 1 and 2, all the fluid circulation pipes are in a meandering shape as a whole, and are supported by the casing at both ends thereof. There are the following problems. That is, in order to improve the light collection efficiency in the CPC type reflection plate, it is necessary to determine the position of the fluid circulation pipe with respect to the CPC type reflection plate with high accuracy. A deflection | deviation generate | occur | produces in a flow pipe, it will shift position, and condensing efficiency will fall. In particular, in order to improve the heat collecting performance of the solar heat collecting apparatus, it is effective to reduce the size of the CPC type reflection plate and arrange more in the casing. For this purpose, the fluid circulation pipe is also narrowed. This makes it easier for the above-described bending to occur. In order to prevent such bending of the fluid circulation pipe, it is necessary to divide each CPC type reflection plate in the length direction and to provide a pipe support between the adjacent CPC type reflection plates. In addition, the number of parts increases.

Furthermore, it is also conceivable to arrange a header in the casing and weld both ends of the straight tubular fluid circulation pipe to the header, instead of making all the fluid circulation pipes communicate and meander. However, in this case, thermal distortion may occur in the fluid flow pipe during welding, resulting in a positional shift and lowering light collection efficiency. In addition, welding that does not cause thermal distortion in the fluid flow pipe is troublesome. In particular, when the fluid circulation pipe is made thin in order to reduce the size of the CPC type reflector, the welding operation that does not cause thermal distortion in the fluid circulation pipe becomes extremely troublesome.
JP 2002-228271 A JP 2003-50057 A

  An object of the present invention is to solve the above problems, and to provide a solar heat collecting and radiator that is excellent in light collection efficiency and radiation efficiency, and that can be manufactured easily and inexpensively, and a method for manufacturing the same.

  In order to achieve the above object, the present invention comprises the following aspects.

  1) A substrate comprising a plurality of upper and lower metal plates whose peripheral portions are joined to each other and having a plurality of fluid circulation portions extending in the front-rear direction and spaced in the left-right direction; and a fluid circulation portion at the lower end portion inside A plurality of composite paraboloidal concentrating reflectors provided on the substrate so as to be positioned, and each fluid circulation part causes the upper metal plate to bulge upward among the two metal plates constituting the substrate. The right and left sides of the composite parabolic concentrating reflector, which is formed by dividing the composite parabolic concentrating reflector at the center in the left-right direction and forming the right portion thereof. Is formed by disposing a reflector constituting member in which the left half forming the upper part is integrated at the upper end between adjacent fluid circulation portions, and both side edges of each reflector constituting member serve as the fluid circulation portion. Solar heat collector / radiator engaged.

  2) The solar heat collecting and radiator according to 1) above, wherein the reflecting plate constituting member is formed by pressing a metal plate.

  3) A constriction is formed at the connection portion of each fluid circulation portion with the flat portion of the upper metal plate, and both side edges of the reflector component member are engaged with the constriction portion of the fluid circulation portion. ) Or 2) Solar heat collecting and radiator.

  4) The solar heat collection according to the above 3), wherein the cross-sectional shape of the upper part of each fluid circulation part above the constricted part is a cut-out circular shape with a part of a circle having a larger diameter than the width in the left-right direction of the constricted part. Heat and radiator.

  5) Solar heat collecting and radiating according to any one of 1) to 4) above, wherein the upper and lower metal plates constituting the substrate are continuously joined in the front-rear direction between adjacent fluid circulation portions. vessel.

  6) Solar heat collection and radiation according to any one of 1) to 4) above, wherein the upper and lower metal plates constituting the substrate are intermittently joined in the front-rear direction between the adjacent fluid circulation portions. vessel.

  7) The solar heat collecting and radiator according to 5) or 6) above, wherein joining between adjacent fluid circulation portions in the two upper and lower metal plates is performed by seam welding.

  8) The front and rear ends of all the fluid circulation portions communicate with the header portion formed by expanding at least one of the upper and lower two metal plates constituting the substrate. The solar heat collecting and radiator according to any one of 7).

  9) A method for producing a solar heat collecting and radiator according to any one of the above 1) to 4), wherein two flat metal plates are prepared, and one metal plate is pressed. After forming the fluid circulation part, the two metal plates are overlapped so as to close the fluid circulation part with the other metal plate, and the peripheral parts of both metal plates are joined to form a substrate. Forming the reflector constituent member by pressing, and arranging the reflector constituent member between the adjacent fluid circulation portions of the substrate and pushing it in from the upper side, fluid flow through both side edges of each reflector constituent member A method of manufacturing a solar heat collecting and radiator including engaging with a portion.

  10) The method for producing a solar heat collecting and radiator according to 9) above, wherein the upper and lower metal plates constituting the substrate are continuously joined in the front-rear direction between adjacent fluid circulation portions.

  11) The solar heat collecting and radiator according to 9) above, wherein two upper and lower metal plates constituting the substrate are intermittently joined in the front-rear direction between adjacent fluid circulation portions.

  12) The method for producing a solar heat collecting and radiator according to 10) or 11) above, wherein the two metal plates are joined by seam welding.

  13) Before joining the two metal plates constituting the substrate, by bulging at least one of the metal plates, a bulging portion for forming a header portion communicating with the fluid circulation portion is provided. ) To 12) A method for producing a solar heat collecting and radiator according to any one of the above.

  14) A solar heat collector having the configuration of the solar heat collecting and radiator according to any one of 1) to 8) above, wherein a solar heat selective absorption film is formed on the upper surface of the upper metal plate.

  15) A solar heat collector having the configuration of the solar heat collecting and radiator according to any one of 1) to 8) above, wherein a black coating film is formed on the upper surface of the upper metal plate.

  16) The solar heat collecting and radiator structure according to any one of 1) to 8) above, wherein a radiation film having an infrared emissivity of 0.90 or more is formed on the upper surface of the upper metal plate. The radiator that has been.

  17) The solar heat collector as described in 14) or 15) above is disposed in a hollow box-shaped casing, and the upper wall of the casing is formed of a translucent plate, and the lower wall of the casing has heat insulation properties. A solar heat collector in which a solar heat collector is mounted on the lower wall.

  18) The radiator described in 16) above is disposed in a hollow box-shaped casing, the upper wall of the casing is formed of an infrared transmitting body, and the lower wall of the casing has heat insulation properties. A radiant cooling device in which a heater is mounted on the lower wall.

  According to the solar heat collecting and radiator of 1) above, since the fluid circulation part is integrally provided on the substrate, the position of the fluid circulation part with respect to the CPC type reflector can be determined with high accuracy, and the light collection efficiency And the infrared radiation efficiency is improved. In addition, it is not necessary to provide a pipe support that prevents the fluid circulation pipe from bending in the solar heat collecting apparatuses described in Patent Documents 1 and 2, and the number of parts can be reduced and the weight can be reduced. Moreover, since the retaining member of the CPC type reflection plate in the solar heat collecting apparatus described in Patent Document 2 is not required, the number of parts can be reduced and the weight can be reduced. Further, the solar heat collector / radiator is disposed in the casing, the upper end opening of the casing is closed by the translucent plate and the lower end opening is closed by the bottom plate, and the solar heat collector / radiator substrate and the bottom plate A solar heat collecting apparatus is comprised by arrange | positioning a heat insulating material between them. In this case, the amount of the heat insulating material is smaller than that of the solar heat collecting devices described in Patent Documents 1 and 2, and it is not necessary to form the ridge-like grooves in the heat insulating material, so that the material cost and the manufacturing cost are reduced.

  According to the solar heat collecting / radiating device of 2), the thickness of the reflecting plate constituting member can be reduced compared with the case of, for example, extrusion molding, so that the weight can be reduced.

  According to the solar heat collecting and radiators 3) and 4) above, it is possible to relatively easily attach the reflecting plate constituting member to the substrate, and it is not necessary to provide a separate engaging portion.

  According to the solar heat collector / radiator of 5) above, when used as a solar heat collector, the required pressure strength can be maintained even if the fluid flowing in the fluid circulation part is heated to a high temperature and high pressure. it can.

  According to the solar heat collecting and radiator of 6) above, when adjacent fluid circulation portions are communicated with each other by non-joining portions, when the flow rate of fluid in each fluid circulation portion becomes uneven and drift occurs The fluid flows through the non-joining portion from the fluid circulation portion having a high flow rate into the fluid circulation portion having a low flow rate, and the flow rates in all the fluid circulation portions become uniform.

  According to the solar heat collecting / radiating device of the above 7), it is possible to relatively easily join the adjacent fluid circulation portions in the upper and lower two metal plates.

  According to the solar heat collecting / radiating device of the above 8), a difficult work as in the case of connecting the fluid circulation part to the header formed separately from the substrate is not necessary.

  According to the manufacturing method of 9), the solar heat collecting and radiators 1) to 4) can be manufactured relatively easily.

  According to the manufacturing method of 10) above, the solar heat collecting and radiator of 5) can be manufactured relatively easily.

  According to the production method of 11) above, the solar heat collecting and radiator of 6) can be produced relatively easily.

  According to the manufacturing method of the above 12), the joining between the adjacent fluid circulation portions in the upper and lower two metal plates can be performed relatively easily.

  According to the manufacturing method of 13) above, the solar heat collecting and radiator of 8) can be manufactured relatively easily.

  According to the solar heat collectors of 14) and 15) above, the efficiency of collecting heat to the fluid flowing in the fluid circulation section is improved.

  According to the radiator of 16), the radiation efficiency from the fluid flowing in the fluid circulation part is improved.

  According to the solar heat collecting apparatus of 17), the efficiency of collecting heat to the fluid flowing in the fluid circulation part is improved. In addition, the amount of the heat insulating material can be reduced as compared with the solar heat collecting devices described in Patent Documents 1 and 2, and it is not necessary to form a bowl-shaped groove in the heat insulating material, so that the material cost and the manufacturing cost are reduced.

  According to the radiant cooling device of 18) above, the radiant efficiency from the fluid flowing in the fluid circulation part is improved. In addition, the amount of the heat insulating material can be reduced as compared with the solar heat collecting devices described in Patent Documents 1 and 2, and it is not necessary to form a bowl-shaped groove in the heat insulating material, so that the material cost and the manufacturing cost are reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  FIG. 1 shows the entire configuration of a solar heat collecting apparatus using the solar heat collecting and radiator according to the present invention as a solar heat collecting device, and FIGS. FIG. 5 shows a method for manufacturing a solar heat collector.

  1 and 2, the solar heat collector (1) includes a hollow box-shaped casing (2) and a solar heat collector (3) arranged in the casing (2).

  The casing (2) includes a frame-shaped frame (4) and a frame (4) formed by assembling a metal profile having an approximately U-shaped cross section with an opening facing inward, in this case, an aluminum extruded profile. A peripheral wall (6) made of a heat insulating material (5) covering the peripheral surface, and a metal, here aluminum, whose peripheral edge is supported by the upper end of the frame (4) of the peripheral wall (6) and fixed to the frame (4) Covers the upper wall (9) made of the translucent plate (8) pressed by the frame-shaped presser (7) made of extruded profile, and the lower surfaces of the plate (11) and plate (11) made of heat insulating material It is made of a metal, here an aluminum cover plate (12) and a lower wall (13) fitted from below into the lower part of the peripheral wall (6) and having a peripheral edge fixed to the peripheral wall (6).

  The solar heat collector (3) is composed of two upper and lower metal plates (14) (15) whose peripheral portions are joined to each other, and a plurality of fluid circulation portions (16) extending in the front-rear direction are spaced apart in the left-right direction. And a plurality of CPC type reflectors (18) provided side by side on the substrate (17) so that the fluid circulation part (16) is located at the lower end of the substrate (17). I have.

  The two metal plates (14) and (15) constituting the substrate (17) are made of a material having corrosion resistance against water, here, stainless steel. At the front and rear ends of the substrate (17), at least one of the two metal plates (14) and (15), here, the upper metal plate (14) is bulged upward, thereby A extending header portion (19) is formed. The cross-sectional shape of each header portion (19) is an isosceles trapezoid (see FIG. 4). The left and right ends of each header section (19) are open on the left and right edges of the board (17), and the ends of the conduit (21) are inserted into these openings and joined to the header section (19). Yes. The portion inserted into the header portion (19) of the conduit (21) is deformed into a shape corresponding to the header portion (19). The tip of the conduit (21) extends outside the casing (2) through the peripheral wall (6). The two metal plates (14) and (15) are joined over the entire length in the left-right direction at the outer part in the front-rear direction of both header parts (19), and front and rear in the part between the header parts (19) at the left and right side edges. It is joined over the entire length in the direction, and further joined from the front and rear side edges to the header part (19) at the outer side in the front and rear direction than both header parts (19) at the left and right side edge parts. These joints are preferably performed by seam welding. On the upper surface of the upper metal plate (14), that is, the upper surface of the substrate (17), a solar heat selective absorption film or a black coating film is formed including the fluid circulation part (16) and the header part (19) (not shown). ).

  Each fluid circulation part (16) is formed by expanding the upper metal plate (14) of the two metal plates (14) (15) constituting the substrate (17) upward. As shown in FIG. 3, the constricted portion (16a) is formed at the connecting portion of each fluid circulation portion (16) with the flat portion (14a) of the upper metal plate (14). The cross-sectional shape of the upper part of the constricted part (16a) in each fluid circulation part (16) is a notch shape in which a part of a circle having a considerably larger diameter than the width of the constricted part (16a) is cut out. is there. The part with a circular cross section is shown by (16b). Each fluid circulation part (16) is gradually deformed so that there is no constriction part (16a) at both front and rear end parts thereof, and has a substantially inverted U-shaped cross section, and the end part is a header part (19) (See FIG. 4). Between the adjacent fluid circulation portions (16), the two upper and lower metal plates (14) and (15) are continuously joined in the front-rear direction, so that the adjacent fluid circulation portions (16) do not communicate with each other. ing. This joining is preferably performed by seam welding. The joint is indicated by (23).

  As shown in FIG. 3, each CPC type reflection plate (18) has a shape obtained by dividing the CPC type reflection plate (18) at the center in the left-right direction and is located on the right side of the fluid circulation part (16). The half body (18a) and the left half body (18b) located on the left side of the fluid circulation part (16) are formed. The left half (18b) of the CPC type reflection plate (18) and the right half (18a) of the CPC type reflection plate (18) adjacent to the left side of the CPC type reflection plate (18) are integrated at the upper end to form a reflection plate constituting member (24 ), And the reflector component (24) is disposed between the adjacent fluid circulation portions (16). The left and right side edges of the reflector constituting member (24) are engaged with the constricted part (16a) of the fluid circulation part (16). The reflector plate member (24) is formed by pressing a metal plate made of, for example, stainless steel or aluminum.

  In the solar heat collecting apparatus (1) described above, the fluid made up of water, antifreeze and the like sent into one header part (19) is divided and flows into all the fluid circulation parts (16), and the fluid circulation part ( 16) It flows into the other header part (19) through the inside. The fluid is heated by the sunlight reflected by the CPC type reflection plate (18) while flowing in the fluid circulation part (16).

  The solar heat collector (3) is manufactured as shown in FIG.

  First, two flat metal plates (14) and (15) are prepared, and one metal plate (14) is pressed to form a fluid circulation portion (16) and a header portion (19). The two metal plates (14) and (15) are overlapped so that the downward opening of the fluid circulation portion (16) and the header portion (19) is closed by the other metal plate (15). Next, the peripheral portions of both metal plates (14) and (15) are joined by seam welding. That is, it joins over the entire length in the left-right direction at the outer part in the front-rear direction of both header parts (19), and joins over the entire length in the front-rear direction at the part between both header parts (19) on the left and right side edges, In the portion on the outer side in the front-rear direction than the two header portions (19) in the portion, joining is performed from the front and rear side edges to the header portion (19). These joints are preferably performed by seam welding. Further, the two metal plates (14), (15) are continuously joined in the front-rear direction by seam welding between the adjacent fluid circulation portions (16). Next, the end of the conduit (21) is inserted into the header (19) and joined by welding. Thereafter, a selective absorption film or a black coating film is formed on the outer surface of one metal plate (14).

  On the other hand, a flat metal plate is pressed to form the reflector plate member (24). Thereafter, the reflector component member (24) is elastically deformed so that its width becomes narrower than the interval between the cross-sectionally lacking circular portions (16b) of the adjacent fluid circulation portions (16) (see the chain line in FIG. 3). It fits from above between adjacent fluid circulation parts (16). Then, when both side edges of the reflector component member (24) pass through the circular cross section (16b), the reflector component member (24) is returned to its original shape by elastic force, and both side edges are constricted ( Engage with 16a). In this way, the solar heat collector (3) is manufactured.

  Note that the selective absorption film or the black coating film is formed by pressing one metal plate (14) to form the fluid circulation portion (16) and the header portion (19), and then removing both metal plates (14) (15). You may form in the outer surface of one metal plate (14) before joining.

  In the above embodiment, the two upper and lower metal plates (14) (15) are continuously joined in the front-rear direction between the adjacent fluid circulation portions (16). May be intermittently joined in the front-rear direction. In this case, since the adjacent fluid circulation portions (16) are communicated with each other by the non-joining portion, if the flow rate of the fluid in each fluid circulation portion (16) becomes non-uniform and a drift occurs, the fluid is non- The fluid flow part (16) with a high flow rate flows into the fluid flow part (16) with a low flow rate through the joint, and the flow rate in all the fluid flow parts (16) becomes uniform.

  Further, in the above embodiment, the solar heat collecting and radiator according to the present invention is used in the solar heat collecting device (1) as the solar heat collecting device (3), but used as a radiator in the radiant cooling device. There is also. In this case, a radiation film having an infrared emissivity of 0.90 or more is formed on the upper surface of the upper metal plate (14) instead of the selective absorption film or the black coating film. Further, as the upper wall (9) of the casing (2), a plate or a film made of a resin having translucency, weather resistance and infrared transparency is used instead of the translucent plate. In such a radiant cooling device, a fluid composed of water, antifreeze, steam, or the like is caused to flow in the fluid circulation part (16), and the heat of the fluid is transferred from the fluid circulation part (16) to the CPC reflector (18). Is emitted toward the sky by which the fluid is cooled. Here, the heat of the heat insulating material (11) prevents the heat of the outside air from being transmitted to the fluid flowing in the fluid circulation part (16), so it is possible to cool a fluid having a temperature lower than the outside air temperature. It is preferable to cool a fluid having a temperature higher than the outside air temperature.

It is a partially notched top view which shows the whole structure of the solar thermal collector which used the solar thermal collector and radiator by this invention as a solar thermal collector. It is the II-II line expanded sectional view of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is a partially notched perspective view which expands and shows a part of solar thermal collector. It is a fragmentary perspective view which shows the manufacturing method of a solar-heat collector.

Explanation of symbols

(1): Solar heat collector
(2): Casing
(3): Solar collector (solar collector / radiator)
(8): Translucent plate
(9): Upper wall
(11): Insulation
(13): Lower wall
(14): Upper metal plate
(15): Lower metal plate
(16): Fluid distribution department
(16a): Constriction
(16b): Cross-sectionally missing circular part
(17): Board
(18): CPC reflector
(18a): Right half
(18b): Left half
(19): Header
(23): Joint
(24): Reflector component

Claims (18)

A substrate comprising a plurality of upper and lower metal plates whose peripheral portions are joined to each other and extending in the front-rear direction is provided at intervals in the left-right direction, and the fluid circulation portion is located at the lower end portion inside. And a plurality of compound parabolic concentrating reflectors provided on the substrate, and each fluid circulation part bulges the upper metal plate upwards of the two metal plates constituting the substrate. The composite parabolic concentrating reflector is formed by dividing the composite parabolic concentrating reflector at the central portion in the left-right direction, and forms the right half and the left side forming the right side portion thereof. The reflecting plate component member, in which the left half is integrated at the upper end, is arranged between adjacent fluid circulation portions, and both side edges of each reflection plate component member are engaged with the fluid circulation portion. Solar heat collector / radiator. 2. The solar heat collecting and radiator according to claim 1, wherein the reflecting plate constituting member is formed by pressing a metal plate. The constricted part is formed in the connection part with the flat part of the upper metal plate in each fluid circulation part, and both side edge parts of the reflector component member are engaged with the constriction part of the fluid circulation part. 2. A solar heat collecting and radiator according to 2. 4. A solar heat collecting and collecting apparatus according to claim 3, wherein the cross-sectional shape of the upper part of each fluid circulation part above the constricted part is a cut-out circular shape with a part of a circle having a diameter larger than the width in the left-right direction of the constricted part. Radiator. The solar heat collecting and radiator according to any one of claims 1 to 4, wherein two upper and lower metal plates constituting the substrate are continuously joined in the front-rear direction between adjacent fluid circulation portions. The solar heat collecting and radiator according to any one of claims 1 to 4, wherein two upper and lower metal plates constituting the substrate are joined intermittently in the front-rear direction between adjacent fluid circulation portions. The solar heat collecting and radiator according to claim 5 or 6, wherein joining between adjacent fluid circulation portions in the upper and lower two metal plates is performed by seam welding. The front and rear end portions of all fluid circulation portions communicate with a header portion formed by bulging at least one of the upper and lower two metal plates constituting the substrate. A solar heat collecting and radiator according to any one of the above. It is a method of manufacturing the solar heat collecting and radiator according to any one of claims 1 to 4, wherein two metal plates are prepared, one metal plate is subjected to press working, and a fluid circulation part is formed. After the formation, both the metal plates are overlapped so that this fluid circulation part is closed with the other metal plate, the peripheral portions of both metal plates are joined to form a substrate, and the flat metal plate is pressed. By forming the reflecting plate constituent member and arranging the reflecting plate constituent member between the adjacent fluid circulation portions of the substrate and pushing in from above, both side edges of each reflecting plate constituent member are engaged with the fluid circulation portion. A method for manufacturing a solar heat collecting and radiator. The method for manufacturing a solar heat collecting and radiator according to claim 9, wherein two upper and lower metal plates constituting the substrate are continuously joined in the front-rear direction between adjacent fluid circulation portions. The solar heat collecting and radiator according to claim 9, wherein two upper and lower metal plates constituting the substrate are joined intermittently in the front-rear direction between adjacent fluid circulation portions. The method for producing a solar heat collecting and radiator according to claim 10 or 11, wherein the two metal plates are joined by seam welding. Before joining two metal plates which comprise a board | substrate, the bulging part which forms the header part which leads to a fluid distribution | circulation part is provided by bulging at least any one metal plate. A method for manufacturing a solar heat collecting and radiator according to any one of 12. The solar heat collector which has the structure of the solar heat collecting and radiator in any one of Claims 1-8, and the solar heat selective absorption film is formed in the upper surface of an upper side metal plate. The solar heat collector which has the structure of the solar heat collecting and radiator in any one of Claims 1-8, and the black coating film is formed in the upper surface of an upper side metal plate. It has the structure of the solar heat collecting and radiator according to any one of claims 1 to 8, and a radiation film having an infrared emissivity of 0.90 or more is formed on the upper surface of the upper metal plate. Radiator. The solar heat collector according to claim 14 or 15 is disposed in a hollow box-shaped casing, the upper wall of the casing is formed of a light-transmitting plate, and the lower wall of the casing has heat insulation properties. A solar heat collector with a collector on the bottom wall. A radiator according to claim 16 is arranged in a hollow box-shaped casing, the upper wall of the casing is formed of an infrared ray transmitting body, and the lower wall of the casing has a heat insulating property. Is a radiant cooling device mounted on the lower wall.

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